Steel-mold.



W. N. BENNETT.

STEEL MOLD. uPLIoATIoN FILED N`ov. 11..1911.

1,027,585.'V E Patenteamay 23,1912.

l() According WILLIAM N.` BnN'N1iTr} or BELLEVILLEf N y 'WILLIAM vv. Lyons No aniram); e. vHr:

J swam-MOLD. I

\ i Speciilcationof Letters Patent.

nw JERSEY; AssIeNoR croata-@MTH To um, Born or NEWARK', LNew masm.

Application November 1`l,l`1911. "SerialNo, 659,4.8154'Q f.

all lwhom t may concern -of Belleville,y Essexcounty, New Jersey,

have invented a new and useful Improve nient in Steel-Molds, of which thefollowf.

isa full,..clear, and exact description; y 'invention relates to improvementsn molds such as `are used .metal'ingots pipe, or cavity forms When the l'fmetal is Icopied in the mold. The forming 29'resii1 t .of this the metal contracts and pulls away from the center, and' forms a hole or pipe in the 4upper part of the ingot, and the metal` .inthe upper part of the mold does not` remain Huid pou'redwill-v be, allowed to cool so slowly `the' views.

in the castingnf` to the present practice in cast-d 'ing steel ingete", a; considerable part of ther .ingot cannot be used owing to the formation oLacavit-y or pipe. in the upper partof theinget, which enough to flow down andv .till'up 'the cavity so formed. The object of my. invention is .to provide arnold in which the metal after it has been y i. i ing drawingsformingafpartiof thislspeci- Bc it known'that I, WILLIAM N. BENNETT,

cation, inv which similarl referencecharacters mdlcate Figure 1.is a i bodyinginy inventiomandFlgfQ isa -sectional elevation of the'same.

In the drawingsl `have indicated.. the mold proper at A10,'havinga :casing or jacket.' The body portion of the mold 10 is 65 composedof fire clay mixed with asbestos, 'i

and lWhile in a plastic condition is formed-- to the shape required of the mold and dried and baked. In mixing the clay With the asbestos I preferably use a. mixture of vari` '.70

ous clays. such as American clay, English clay, German claygand china clay, the proportions of' the diiferent clays and the as l bestos naturally varying according tothe size' and sha sufficient v toughness and elasticity in thev molten metal being poured into it.

`In order that the body portion of the mold may be secured and firmly held against the casing or jacket, I provide Vanchorin corresponding@ parts AV'in all l sidel vieiv the mold em- 6( l of the molds required. The iibrous qualit-y of the asbestos will insure j 30." the .top of the moldA to flow `into the' cavity Y i that there will be suiiicient molten metal at rivets 12 which are a part of the jacket an have turned ends so as to. firmly anchor formed .by contraction; and 1n this Way avoidthe formation'ot. the pipe or any-appreciabledepression in the'top of the ingot.

j, Tolaccomplish thisI provide a inoldhavf 35 ing acasing or jacket, but the main or body "portion of theimol'd coming in contact with ,theinolten metal being made of a materialwhich is a poor conductor of heat. Thisy -bodyportion of the mold I preferably make ,40 vvof fire clay or a mixture ofseveral kinds of fire clay wi-thfa'sbestos." The asbestos inthe mixture acts not.v 'only as -a non-conductor of heat, but gives the mold suiiicien't tough` ness and elastici yto prevent cracking which 45 otherwise Woul result from tlie expansion caused by themolten metalcoming in conf tact .with ,it Insuch an ingot mold the metahdue to the" fact that-,thev body of the mold is a -poor conductorlof heat, Will' 5o cool 'slowly enough so' that it Will settle naturally as it cools, and avoid the sudden Y. contraction and' pulling A away; v 'fromf the center, and theolfmation of the pipe.- above referred-to.

5 Reference theaccomlninyu them in the body of the non-conducting part of the mold,

In making the mold, the different A"clays A and the asbestos fiber are thoroughly mingled in a diy sta-te, then moistencd to make them plastic, and are then given the lde sired shape in Ythe usual way, after Which the @wld is dried, temperedfand baked.-

I have referred to themold as being specially adapted for forming metaringots, but '95 it can :be used as a mold to receive any molten metal to give it the desired shape, and for the reasons stated will make adenser, better casting v than th'ev ordinary 'metal molds. I wish to call attention to the lo? fact, too, that while I have referred to fastening rivets 12, any suitable fasteningv devices Acan lbe used to hold the mold' toits jackets,- and While I have `shoi'rvna whole mold, ythat is ai mold of a single integral piece, it can be made in theiorm ofthe ordinary split mold if desired Without aiiecting the invention. It is apparent therefore that I'- -provide a mold whichis toughnndplastic .andis a' poor conductorofheatyfsgithat 119 l when molten-metal isfpoured into the mold the :metal willmvcool sufficiently slowly on.

I rials'have been used as a packing for molds, but this; does toward the center of the ingot, thus prevent- `inotwith an essentially flat top.

`terials most desirable,

when combined, a lmore to act as abinder for the other materials;v butv if desired any other Well known or preferred' binder can be usedwith the materials stated.

1. A mold comprising a body portion comits outer isurface to permitf of its dwing ing the vformatioxrof a pipe andl leaving the am aware that non-conductingmatenot answer thepurpose, as the non-conducting refractory material must comein actual contactwith the molten metal to produce the desired effect andv to prevent the heat 0I' the metal from being too rapidly radiated. I `Wish Ato further call attention to the fact lthat the invention is not limited to the particular kinds of fire clay referred to, vbut I have found. these 'maas they withstand the action of the vmolten metal and form, durable, smoother,

and a jacket surrounding the bod portion. 2. An ingot mold comprising a dy portion of`mater'ial composed of a mixture of fire-clays and a Ifibrous refractory material, a jacket surrounding the` body portion, and anchoring means supported yin the jacket and engaging the body portion. I WILLIAM N, BE(NNl/IUYFiiv Witnesses: 1

ANNA W. lesion,-

' GRACE K. LOGAN;

vand tougher mold than when they are used', separately, and the German Sire clay seems' posedV of a mixture of lire clayand asbesto/s, 

